The FIC IC is OK if the US goes 100% Pacific. As a matter of fact I think it is one of the best IC positions in this case. It is harder to lose than any of the island positions. Both of the seazones it serves may also give a safe build spot close to the action. Think putting planes on carriers to maximize those two slots. Also as axis_roll pointed to the FIC IC does not require any naval servicing. If it is not needed for ships it can be producing ground units for South West Asia. The Allies are thin here even with the cluster they start with in India, it will not take many troops to decide this area. This opens up the possibility of an IC in India and these can support themselves.
I do think that akreider2 is correct in that if the US does go 100% Pacific (keep in mind this is how I play Allies) that Japan does need to limit its IC building. I know as the US I love to see a Japanese IC go down in E. Indies on round 2. This is a fixed point that the Japanese navy will have to defend. While FIC is also a fixed point, it can be relived by land, and is more interior, so this reduces its drawbacks in a US PTO game. I think the Key to surviving these as Japan is to avoid having to defend multiple areas that one can not afford to lose. While the islands do matter for IPCs and NOs they can be left for a turn or two in enemy possession if the situation requires it. With an IC at that location it becomes a different consideration an MUST be defended and this is what allows the US to kill Japan.