This is pretty simple. Give villain a range, figure out how much equity you have versus said range. Figure out if it's enough to call.

What is the villains range you ask? Your guess is as good as mine. Try different ranges, see where the cutoff points are for a call. Nobody on this forum should be able to do a better job of this then you as long as you put in the time and effort to solve this problem.

edit: Okay maybe in game your range estimation is a bit off, maybe even out of game but if you don't guess at ranges on your own how will you ever improve. You aren't a complete beginner so I'm sure you have a decent grasp on how to estimate ranges yourself.