Estimating the run time of a program according to a given CPU performance

Question

When we have a recurrence relation of a program, as an example:

 T(N) = N log N + 9N + 55

and the CPU capability let's say (10^6) or any other number. What is the formula or the method to estimate the run time (in second) if we run a program represented by a function of N, and a given N "inputs"?