The work which you are contributing matters more as compared to number of societies.
I have seen students been a part of 3-4 societies but not able to commit time to anyone. On the other hand, if you are a part of any one or two societies and you worked hard in that, it will simply reflect in your position. For example, in the 1st year, you were only volunteer, then you became core member, then next year VP of society.
According to me, that matters more as compared to being part of 3-4 societies.