3/6 hu hand vs. semi-unknown

[aejones]

sometimes he'll have fours full here, other than that, you're good he's got two nines

[RiverHebrew2]

I'd bet about $110 on river actually, and if hes a little donkish, he can't tell its valuebet. I'd fold to a minraise/shove. I would have guessed he had Q after the turn, but I don't understand why he would check the river if he did. He has 66 or 77, or lower flush.