A minraise at these stakes means very little. He could have anything. Any X4 has you beat and it's not worth 3/4 of your stack to find out. I Fold here.
so i probe bet 2xbb to find out where i stand.
Suggestion: Maybe start thinking of your post-flop bets more in relation to the pot size instead of the bb size. Not nitpicking but it just makes it easier when you start thinking in terms of pot odds.