You can't compare new coaches to old coaches and their salaries. You can only compare sport to sport. The fact being that you couldn't get a decent football coach at ESU for forty grand, whereas forty grand will get you a good volleyball coach. Compare the average salaries of DII volleyball coaches nationaly and compare her salary to others. That is the only way you can determine if she is getting paid unfairly.

If you are using the male to female comparison then look at this analogy. The owner of the LA Lakers also owns the LA Sparks. Does the owner have to pay the women players as much as the male players? No. Is that sexual discrimination? I don't know.
Everything is just what it is.