What are the process and practices of requesting for pre-submission peer review from field experts?
If you are an undergraduate and this is most likely one of your first papers, then yes, it is a good idea to have someone check it.

Even if none of the professors or colleagues you work with are familiar with your specific topic, they might still be able to give you advice regarding style and dos and don'ts in your field.

I would suggest to ask around, ask your advisor, ask others from your lab. That should have a higher chance to succeed than contacting a random professor who doesn't know you; they tend to focus their energy more on their own students.