Don't cancel your test - you will lose 200$, rather reschedule your test. I would suggest you two things
- Change your target score to 650, and study for 3-4 months, 10-15 hours a week.
- Be prepared to work for 6-8 months to reach your score of 730.
Sorry if that sounds a bit negative.
The question is not can you rise up to iconic! The real question is will you ?