Blind defense gets good, then gets weird

[Str8Fish]

Hands that beat you that are reasonable for him to have:
AQ(16),KT(9),TT(3),A2c-AJc(7),K5c-K9c(3),JT(9),89c(1-if that),Q9c(1) = 49 combinations

Hands that you beat that are reasonable for him to have:
um... air? Honestly I can't think of anything that bluff raises this river. Let's try it this way... how many combinations of air must villain have in order for this call to be correct?

EV=0=-1BB*49/(49+x) + 9.25BB*x/(49+x)

Solving for x... x~5 combinations. I think we can find 5 combinations of SOMETHING that he might have that is air. How about KQ? AT? AJ? Tilt-induced 85?