Relation between samplingrate and frequency
you have 9 $\times$ 44100 = 396900 samples. I assume you did a single FFT and you should take the first , 198450 complex points for your plot after taking the magnitude square.  The last 198450 points out of the FFT are a mirror image of the first 198450 points so you can neglect them. The first kept  point corresponds to $f=0$ and the last kept point to $f=22050$ Hz.  which makes each bin  .1111 wide