What should I do in this situation?

My friend knows this and got her phone number to p on to me(she is looking for a girlfriend).Ive seen her around,but if the truth be told I actually find her a bit intimidating and she is quite masculine(I am butch)and a friendly person though I havent really chatted with her.Do you think I should call her as shes given my friend her number(she is obviously looking for a girlfriend)but I dont think wed get on in this sense(should I go with this instinct or ring her?)