I have a RSA encryption with e = 3 , and N (2048 bits)

i want to find the value of m (plaintext), so that the cipher (in bytes representation) value end with '\x00'+MySpesificString.

cipher = pow(m,e,n)

with m is any string, and cipher is "any string"+"\x00"+"MySpesificString"

How i can find the possible value of m?