(1/3NL) Pocket 8s first hand at the table

100bb effective

Hero just sat down, first hand being dealt. Everyone is an unknown.

Villain raises UTG $10, pursed his lips and showed his cards to his buddy next to him.

1 caller. Hero raises to $40.

Villain calls, other V folds.

Before the flop is dealt, Villain says quietly to his friend “this is a good spot to check raise the flop”. He definitely said it under his breath and not intended for someone to hear, but I did, and we made eye contact. So he knows that I heard him.

Flop ($93) - 7s 7d 2s

Villain checks, Hero bets $45, Villain shoves $300, Hero??