Highlight the track that is producing the unwanted noise.
In the channel strip to the left of the track, select "Specialized" > "De-Noiser" from the channel strip. This plug-in separates the track into separate channels, allowing you to place filters on different frequencies.
Adjust the "Threshold," "Reduce," and "Noise Type" sliders until you have eliminated the unwanted noise. This is a trial and error process. Play around with different combinations until you have eliminated the unwanted noise.
Select the "Default" pull-down menu. Here you will find a list of filters to further eliminate hiss and pops. Select the appropriate filter for the noise you want to eliminate.