Villain seems good and probably views hero as good. Has not been overly aggro but probably capable. We've been at the same table for about 2-3 hours and not really tangled so far. Hero has been opening a lot and calling a lot IP. Hero played a couple of much smaller 3 bet pots OOP in the last orbit, losing both (open-folding pre once, and open-calling then check folding the flop the other). Villain has 3 bet hero OOP once before with TT.

Hero has around $1300, villain covers.

Hero opens $12 from MP w AhAx. One caller and villain 3bets to $55 from the BB.
Hero 4bets to $135. Villain calls.

Flop Th5h5c. (~$300)

Villain check-calls $165.

Turn 9o (~$630)

Villain leads $275, Hero calls.

River 9o (~$1170)

Villain shoves. (approx ~$750 to hero)

Hero calls?