I really can't see what he could possibly have that beats you.
you might want to pm tank. he's got hold of a list of the hand rankings
I call pretty much all the time here
LOL com
However Kin kinda has a point, hard to put him on a full house.
Problem is it's hard to put him on a strong flush type hand either. Only plausible non-flush hand that might pay you off is an overpair.
Anyway, I'd say it's a call and expect him to have not very much or 44...