25NL Facing PSB

Posted 3 years, 3 months ago

Blinds: $0.10/$0.25 (6 Players) BN: $26.26
SB: $26.10 (Hero)
BB: $20.54
UTG: $25.00
MP: $36.07
CO: $34.21

Preflop ($0.35) Hero is SB with 9 T

2 folds, CO raises to $0.70, BN folds, Hero raises to $2.50, BB folds, CO calls $1.80

Flop ($5.25) 4 3 7

Hero checks, CO bets $5.01, Hero raises to $23.60 and is all in, CO folds

Unknown villain, Wasn't sure what to do on flop should we be betting or checking here? What to do vs this PSB? Also is 3b size too big pre?