How many unpaired 7x hands to people tend to play in that game? We don't have a fish read and his stack size is a little interesting as he either played some big pots recently or has been at the table for a while.

I'm thinking QQ+/77/22/CrubFrushDraw/A7s/76s/78s Maybe some wild bluffs in there or a weird 7x hand. None of those are a clear fit other than 77/22/bluff, but we can't rule them out given the lack of information on our opponent.