<image> A certain road section is a speed-limited segment, where the speed of the cars passing through the segment must not exceed 70 km/h, otherwise, it is considered a violation and points will be deducted. One day, 1000 cars passed through this road section. The radar speed measurement yielded a frequency distribution histogram of the speed of these cars as shown in the figure. Approximately how many cars violated the speed limit and had points deducted?