Should I call this river probe raise?

Hi all,

Had this hand at my local $2/$5 game yesterday. Villain (UTG) - a solid winning reg - opens to $20 off an $1100 effective stack. There are two callers before it gets to hero, who calls in the BB with A♠9♠

FLOP ($72)

6♠3♠3♦

Hero checks, villain bets $60, two folds, hero calls.

TURN ($190)

6♠3♠3♦7♥

Hero checks, villain snap checks back.

RIVER ($190)

6♠3♠3♦7♥T♠

Hero miscalculates pot size and bets $85 (usually I would usually go larger here, to $130 or so). Villain raises to $300. Hero...?