Ask yourself this.
What was your preflop plan with 66?
To setmine or to outplay your opponent postflop?
If you called to setmine then that means you thought you had massive implied odd if you hit a set. Massive implied odds
means he dosent fold.
If you called to outplay postflop then you cannot be setmining as you believe he can be made to fold often. But if thats the case, you could have 3bet 66 preflop.
Think what you believed his tendencies were when you made the call.. those tendencies havent changed just because you missed.