I felt like since he's so passive preflop that this could easily be KK/QQ/JJ.

Obv. he had 76o. Obv. since 76o is in the two 22% of hands (fuck pokertracker).

Given what he had, I really didn't lose any money in this hand. He called as a massive dog preflop and on the flop, and then I paid him off on the turn and river, but I don't think he even got paid off well enough to make up the EV loss on earlier streets.